Desk telephone station



July 16, 1929. V F. MERK 1,721,402

DESK TELEPHOIiE STATION Filed Jan. 29, 5 ZSheets-Sheet l July 16, 1929. F. MERK 1,721,402

I DESK TELEPHONE STATION Filed Jan. 29, 1925 2 Sheets-Shet 2 Patented July 16, 1929.

UNITED STATES V 1,721,402 P TENTOFFIC FRIEDRICH MERK, on MUNIo eERMnNx'.

DESK TE EP ONE STATION.

Application filed January 29, 1925, Serial No.

This invention has for its object to create a desk telephone station with hand set and finger dial which is of compact, simple and cheap construction.

The invention relates .especially to the.

shape of the casing and to the special arrangement of the finger dial and of the hand set. I

The casing of the a pedestal and of a box is, as regards shape and size, adapted to the finger dial embedded in the inclined top plate of the box and it is fitted with a fork-shaped support for the handset arranged so that the hand set viewed from above in the positionot' rest intersects the casing. I V

As the finger dial is mounted on the top side instead of the front side of the casing it ing the size of the station and reduces the cost of manufacture owing to the saving of material. To obtain these advantages the construction of the apparatus must be carefully considered and they must be cleverly accommodated in the casing, and the forkshaped support for the hand set must also be cleverly arranged so that the supporting points for the hand set are situated above the finger dial. Any suitable construction and mounting of the fork-shaped support may be used. The hand set is arranged a short distance above the finger dial in order that the weight of the hand set acts as closely as possible to the centre of the station so that the stability of the desk telephone station is increased. This arrangement presents further the advantage that the user of the station must remove the hand set from the fork-shaped support before he can adjust the finger dial on the desired number.

For the purposes of the invention a small finger dial is especially adapted, as to such a finger dial corresponds,'in accordance with the invention, a small, round or rounded casing, which can be simply and inexpensively made from sheet metal, otters large inner apparatus composed of 5,586, and in switzerlandDecemlier 15, 1924;

space-for its height properly selected, 'requires little material and harmonizes well withthe inner finger dial. According to the:

invention: the casing is arranged so that th'e finger dial can be mounted on the same in.

inclined position, and the finge di l b built in later on, e. g

change has been arranged for fullautomatic service; I V I a -An embodiment of the inv'entionisillustrated, by way of example, on the accompanying drawing, in which i Fig.1 is a front elevation of the improved desk telephone station.

Fig. 2 is a plan view of the same.

Fig. 3 is a sideelevation ofthedeskstation,

the casing being shown in section; I I

Fig. 4 is a plan view, the top parto'f the box being removed. I I I The casing of the apparatus consists of abox D of circular cross section and of a circular pedestal S. The top plate of the box is forwardly inclined and has an aperture into which a number switch .N, with finger dial when the-central exof small diameter'and-having finger-holesarranged in a cirelelin a'manner known. per

ranged on the topplate of the-box. (To make room for this support thenumber switch" is displaced forwards-from the center of-th'e box. This displacement is so slight that the number switch covers nevertheless the main part of the top plate of the box, the diameter of this top plate being only slightly greater than the diameter of the number disk. The horizontal axle A for the support G is mounted in two round holes arranged in side walls of a bulged out part of the rear upper end of box D. The upwardly directed and slightly forwardly inclined'two arms of the support G, fork-shaped at the upper ends, are fixed on the two projecting ends of axle A. Theaxle G with the arms of the support is adapted to rotate between two. stops.

support G, the support is pulled away from the finger dial by the action of a spring and When it is placed on the support this sup- 7 port is lowered towards this finger dial.

VVhen the micro-telephone M is taken olt the finger dial when the hand set is lyin on the supports. As in this case the han set, as

shown in Figs. 2 .and 3, is horizontally situated above the finger dial'the user of the apparatus must, of course, remove the hand set from the support beforehe canadjust the finger dial to the correct number so that the mechanical locking of the finger dial may not be'necessary.

It is suppo e tha th station work th central battery and alternating 'currentcallsignal and: in this. case the .devicesaccommodated inthebox are: 1theifollowing: =An up rightalternatingcurrent alarm- W is mount.

ed -,iI15. the reanpart ,ofthe box. This alarm consists, of La twogarmed permanent..magnet havingiacoil arrangedbetween the. arms. On one POlQ PlGCGQOfgthG coil an armature is horizontally mountedwhich covers the two arms of the permanent magnet. The clapper shaft fixed. .on, the armature, extends down- 1 contacts of the number switch so-thatthe elecward in the rear rounded part of .thebox to. a

g'ong which is sounded when thearmature oscillates. On the uppersurfaceof the pedestal B a condenser K series-connected with the alarm andbelow. said plate the. commonly used induction coilJ. aretmounted.

On the condenser KK twocontact springs G are. arranged adaptedtocomein contact with triccontact of :the number switch is effected without the aidof aloose cord. -Atzthe right and left. of the gong .orof' the induction coil sutficientspaceris availableinthe pedestal S forethe. connection of the connecting wires for the-. micro-telephonei and for -:the outer .con-

ductors. In order to protect theelements in the pedestal. against 'damag-ing from the outside. the. pedestal has; a. erforated bottom plateiB with rubber feet: or supporting the deskteleph'one station. I a

'Th'e box :D is fixed onthe pedestal by means handled;

side ofthe pedestal serves forpreventing the accidental back rotation of the box.

The weight of the desk telephone station as describedfis sufiicienti to ensure, the stability at the rotating ofthe finger dial ancl'toprevent tilting or displacementof the desk-telephone when the hand set shouldbe carelessly I claim i 1. A telephone set comprising in combination, a base, all the apparatus required for. the operation of the setascondenser, induction coil and. alarm mountedxon said base, a case for this apparatus mounted on said'base having an. inclined topplate; ajfinger dial of standard construction about 3ofdiameter mounted on the inclined top plate of said case,

said base case and finger dial viewedifrom above being all of approxi'matelyflthe same size. v

2.;A telephone set as specified in claim 1, comprising in combination withthe base the case and the fingervdial, said alarm mo untedin therearportion of saidcase in upright position, said condenser andsa1d induction coll mounted in the front p ortion of said case, con-' tacts on said condenser, counter contacts on said finger dial so that these contacts and counter contacts touch each other when said case is mounted on said base.

In'testimony whereof I aifix my signature.

FRlEDRI GH- ME RK. 

